Why the surprise? Townshend used to be a mod and sharp Italian and Saville Row suits were very much their thing.
Townshend's politics are moderate left(ish) in UK/European terms so probably off-the-scale left by US standards :-)
And for another besuited Who member, Wilko Johnson and Roger Daltrey.....
https://m.youtube.com/watch?v=LeoKCJNI-k4